additional rental discounts?

[goofeyshell]

I have now reserved a car from National with the old code (thank you mazzarafe).....there are no coupon discounts for Feb/Mar yet. When they come out will I be able to add that discount to my reservation??? Or, If I need to make a new res. when does the old code really become old??

 

[GAIL HAYDEN]

You will need to make a new ressie. You can try to modify the ressie, but, that does not always work in your favor and I have no idea why.
Before you cancel the old one, make sure the new one is better with whatever discountyou use.
As to codes, it depends on the code as to when it expires.